Portion of a display screen showing a user interface



The FIGURE is a front view showing the new design.

The broken lines illustrating a portion of a display screen are forillustrative purposes only and form no part of the claimed design. Thebroken lines illustrating “CONTENT” are for illustrative purposes onlyand form no part of the claimed design. The two broken line squares formno part of the claimed design.

The ornamental design for a portion of a display screen showing a userinterface, as shown and described.